Observe Surroundings
This one seems simple but here are a few things to look out for to avoid crashing your drone. Obviously you’re going to want to look for trees, buildings, and wires, but you’re also going to want to pay attention to the height of objects around you for two reasons.
First, although regulations in most countries and the US are 400 feet (121 meters) it doesn’t mean you should always fly to that height. For example, if you’re standing on a beach with cliffs on either side, you shouldn’t fly much higher than the cliffs because you can’t see what is coming from the other side of the cliffs and helicopters could fly low without you being able to see or hear them coming.
Second, you’ll want to set your return to home altitude to higher than surrounding obstacles even if you don’t plan on flying above or around them. This means that if your drone were to get disconnected, you wouldn’t have to worry about the drone hitting any obstacles when it returns to you.
Almost every drone I have on my drone buyer guide has a smart return to home feature.